northwestern vs. unc out of state admission?

[Sam_Lee]

<p>

UNC (in 1991)
1120 average in-state (68th percentile)
1293 average out-of-state (89th percentile)
weighted average (18% OOS): 1151 (74th percentile)</p>

<p>Applying that 21% differential, while maintaining allowances for the bell-shaped curve (ie the differential decreases as the score increases) to the most recent academic year and working backwards:
UNC average SAT score in 2008: 1305 (90th percentile)
1180 average in-state (77th percentile)
1340 average out-of-state (92nd percentile)

</p>

<p>elsijfdl,
Can you redo the approximation? It doesn’t look right to me. The overall average in 2008 should be a lot closer to the average in-state, not average out-of-state, like the 1991 data you showed. It seems to me the average of in-state and out-of-state for 2008 were both understated.</p>